[Samba] Big Problems with samba 4.1 and mdb files

[Jörg Mayer]

Our installation:

7 x Windows 7 Clients, 1 Samba 4.1.4 Server with Active Directory

The clients use mdb databases. 

 
Our situation:

Every 30 to 60 Minutes a windows 7 client cannot receive the actual database. After a new login, the data is actualized.

 
Configuration:

We tried:

 
Oplocks

---------------

       oplocks = no

       level 2 oplocks = no

or

       veto oplock files = /*.mdb/*.MDB/*.mde/*.MDE/

or

        blocking locks = no

or

       oplock contention limit = 4

 
Result:

Much too slow and still no actualization of all clients

 
SMB3

------------

        max protocol = SMB3

 
Result:

The same problem with the mdb databases.

 
Speed settings

-----------------------

        strict allocate = yes

 
Result:

Giving ~30% speed, but no solution

 
The most funny thing is, that samba 3.5 was working over many years without any problems on many servers. Since the latest Samba 3 and even including Samba 4.0, there is a failure every, 1-4 hours.

 
What can we do?

 
Thank you